Gearbox control device



Jan. 20, 1948v Fiel- G. CHAUSSON GEAR-BOX CONTROL DEVICE Filed Dec. 3, 1945 INVENTOK Gason [/'musson ATTORNEBS Patented Jan. 20, 1948 UNITED PATENT OFF CE l'GEARBGXlGONTR'OLfDEVICE .Gaston Chausson, Asnieres', France, .assignor to Societe 'Anonyme .des Usines` Chausson, vAsnietes, France, a company ,of France 4 Claims.

l ."he .object A,of .the ,present .inventionis '.a `gearbox control device .permitting ,reliable and easy operation, whilepresentingaconstruction ofLgreat simplicity. y

.lonffcrmably ,to the invention, the I.hubsoi .twc driving arms .of the .,slidinggears :slide Aalongha spindle and are .eachsolid with .a small plate bearing fa. notch, said. small ,platesare ,placed .each .on (me .side ,of .said spindle, ithen the .operating leverQis .terminatedby a fork .the .twcprongs of whicharespaced frcmoneanotherby the Ydiamf tei .of `said ,spindle plus .the thickness .of said small platesso that .one .f.sad".branches .may be completely .disengaged `when 4the `other .is enn ltly introduced, by .a vmvele'rit trahsverse to fs'ad spindle, in the notch 4of .che of .the small plates, a bolt .of .a .length ,ccrr'e'spcnding to the interval vprovided v.betwleeri ...the Y.branches .ci .the okslling lh a-bore `t1a'.r1v.erse .to saidspindle 'at right .angles .with 'the "branches .of .the `ork when the operating-levehis in neutral.

The spindle on which the hubs of the two driving arms of the sliding gears `slide can be overhangingly mounted on a wall of the gear-box, ''r instance 'on-its cover, which iaeilita-te's mounting.

Moreover, :the `small plates .fare "of a suitable length so that the one which moves remains in cont'act'with the end of the bolt during the whole amplitude ofitsfmovement in order tamantain said bolt engagedin `the notch fof'the other small plate which is thus immobilized in neutral, the i'lxed f s'mall plate serving on "the .other .hand as ka guide for 4'the free branch f the fork 'which does not eiect the operation.

Further features and advantages of the invention will be gathered from the following specication and from the drawings, in which the invention is illustrated by way of example:

Figure 1 is a side elevation of the device.

Figure 2 is a horizontal section substantially according to line a-b of Figure 1.

Figure 3 is a side elevation, partly in section, of the control lever.

Figure 4 is a side elevation of one of the driving arms of the sliding gears.

A spindle I is mounted in overhang on a wall of the gear-box and the two hubs 2, 3 of arms 4, 5 can slide along said spindle. Each of said arms is terminated, as shown in Figure 4, by a driving fork 6 of a sliding gear 1. Arm 5 actuates for instance the first speed and reverse sliding gear, while arm 4 actuates the second and third speed sliding gear.

A small plate 8 is xed to hub 2 on the side of spindle yI, .to whichit is tangent and a smallplate Sis .fixed to hub Sjon the other sideof said spin dle. 'The small plates presents a notch I'0.and the `small plate l9 .a notch II. The two notches 'I0 and 'II of'thesmall plates 8 and 9 are placed opposite each Iother, vfacing a bore -I2 `passing through spindle I `transversely when the control lever .I3 vislinneutral. A bolt Illis placed in such agmannerastoberable to slide in bore I2. Said sliding bolt is of a .length corresponding -to the length of said ibore, plusythe thickness of one of the smallplates 8 or 9.

The -lever Alf3comprises an articulation swivelioint `permittingfit tozbegiven orthogonal movements and,at its controlling end, a fork with two branches J6, .-I.'I., `the interval Abetween said 4.two branchesbeing substantiallybf the same length as-.theslidingbolt I 4.

'hedeviceiunctions in the following manner:

n neutral, the .lever I3 occupies the position represented .inFigure .1, in .which-.the notches I and .l I .of `'thetwosmall 4plates 8 and -9 are vfacing the bore I2 containing the bolt I4, which -hali engages in the notches lll and II by its twoends thusimmobilizing the two hubs 2, 3, with their arms 4,.,.5 and vthe `sliding gears carried by them. Thetwc ends i6, .Il of the forkterminating lever 13 aie=placed .on either side of bolt I4, .so that bygiving a .transverse movement in one Idirec- 'tion crthe other to' lever I3, it is possible to make saidboltslide `and bring branch I6 of the fork entirely .into notch Il .of the small `plate 9, as represented in Figure 3, or, .on the contrary., branchI'I intonotch Il) of small plate 3. `In the latter case, branch I6 becomes disengaged from notch II, as indicated in dotted lines in Figure 3.

To pass into reverse, branch I6 is brought into notch II of small plate 9 by giving a transverse movement to lever I 3; the bolt I4 is thus pushed and engages in notch I0 of small plate 8 which becomes immobilized. The lever I3then -receives a longitudinal movement in the direction of arrow ,f in Figure 1, so that it pushes the small plate 9 and the hub 3 which is solid with it, as well as the arm 5 and fork 6 carrying the reverse sliding gear towards the corresponding transmission. The end of branch IB then occupies the position I B.

To pass into rst speed, the lever I3 is pivoted in the direction of the arrow f', so that it pushes Athe sliding gear carried by fork 6 towards the corresponding transmission. The end of the branch I6 then comes and occupies the position I6".

To pass into second speed, after having returned the lever I 3 to neutral, a transverse movement is given to said lever to bring branch I'I of its fork into notch Ill of the small plate 8, the bolt I4 engaging in notch Il of the small plate 9 which it immobilizes. The lever I3 is then made to pvot according to arrow f, displacing the arm 4 and the sliding gear carried by said arm towards the second speed transmission.

To pass into third speed, it is sufficient to impart a longitudinal movement to lever I3 in the direction of arrow f to bring the sliding gear carried by arm 4 into engagement with the corresponding transmission,

The small plates 8 and 9 are made of a length such that the end of bolt I4 which is not engaged in one of the notches Ill or I I may be in contact with the inner face of small plate 9 or 8 throughout the displacement of the latter, so that the other end, of said bolt which is engaged in notch I or II cannot come out of said notch. Thus, one of the hubs 2 or 3 solid with arms 6I, 5 carrying the two sliding gears is imperatively immobilized during the operations of the other hub of sliding gear arm. The lever I3 can therefore, under any circumstances, only actuate one of the sliding gears, which provides absolute safety, for one of the sliding gears is inevitably immobilized in neutral during the operation of the other.

In addition, the branch I6 or I1 of the fork which is disengaged from notch I0 or l I is guided along the whole of its longitudinal movement by the outer face of small plate 8 or 9.

This device is moreover of great simplicity and only presents very small bulkiness in the box.

'In the example represented, the small plates 8 and 9 are welded to the respective hubsl 2 and 3. They might also be forged in one piece on these parts or be fixed to the latter by any other means.

It is evident that knuckle I5 is properly pinned, in a known manner, so as to permit none but orthogonal movements of lever I3.

Various modifications may moreover be made in the construction represented without exceeding the scope of the invention` I claim:

1. A gear-box control device, comprising in combination .a spindle, sliding gears, two arms controlling the sliding gears, said arms having hubs sliding on said spindle, a fork provided on said arms for driving the sliding gears, a small plate iixed on the side of each hub, a notch in said small plate, a bore passing through said spindle transversely, a sliding bolt in said bore having a length corresponding to the length of said bore plus the thickness of one of the small plates, a control lever having an articulation swivel-joint permitting it to be given orthogonal movements andan end fork with two branches with an interval between the latter having substantially the same length as the sliding bolt, the notches of b-oth small plates and the bore of the spindle being alined when the control lever is in neutral.

2. A gear-box control device, comprising in combination a spindle, two arms driving each ra sliding gear controlling two speeds, said arms having hubs sliding on said spindle, a fork provided on said arms for driving said sliding gears,

' a small plate fixed on the side of each hub on either side of said spindle to which both plates are tangent, a notch in each of said small plates, a bore passing through said spindle transversely, a sliding bolt in said bore having a length corresponding to the length of said bore plus the thickness of one of the small plates, a control lever having an articulation swivel-joint permitting it to be given orthogonal movements and an end fork with two branches with an interval between the latter having substantially the same length as the sliding bolt, the notches of both small plates and the bore of the spindle being alined when the control lever is in neutral- 3. A gear-box control device according to claim 2, comprising small plates which are of a suitable length so that the one which moves remains in contact with the end of the bolt throughout the amplitude of its movement, so as to maintain said bolt engaged in the notch of the other small plate which is thus immobilized in neutral, the fixed small plate serving on the other hand as a guide for the free branch of the fork which is not eiecting the operation.

4. A gear-box control device according to claim 2, comprising a spindle, on Whichfslide the hubs of the two driving arms of the sliding gears, which is overhangingly mounted in the gear-box.

GASTON CHAUSSON.

REFERENCES CTED The following references are of record in the' file of this patent:

UNITED STATES PATENTS Number Name Date 2,168,592 Vanderveld Aug. 8, 1939 FOREIGN PATENTS Number Country Date 88,830 Austria June 26, 1922 

